Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual foi a presença quando o Southend United era o time da casa?
 ###Tabelas: CREATE TABLE singles:_10_3–7 (singles:_10_3–7_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE winners_by_country (winners_by_country_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Total INT, Marathon (mens) INT, Marathon (womens) INT, Half Marathon (mens) INT, Half Marathon (womens) INT) CREATE TABLE parliaments_of_king_edward_iv (parliaments_of_king_edward_iv_id AUTO_INCREMENT PRIMARY KEY, Summoned VARCHAR, Elected VARCHAR, Assembled VARCHAR, Dissolved VARCHAR, 1st member VARCHAR, 2nd member VARCHAR) CREATE TABLE uefa_champions_league (uefa_champions_league_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Competition VARCHAR, Round VARCHAR, Club VARCHAR, Home VARCHAR, Away VARCHAR, Aggregate VARCHAR) CREATE TABLE first_round_proper (first_round_proper_id AUTO_INCREMENT PRIMARY KEY, Tie no VARCHAR, Home team VARCHAR, Score VARCHAR, Away team VARCHAR, Attendance VARCHAR)  
SELECT Attendance FROM first_round_proper WHERE Home team = southend united